21311123323354 has 16 divisors (see below), whose sum is σ = 32391223286400. Its totient is φ = 10514214700704.

The previous prime is 21311123323337. The next prime is 21311123323361. The reversal of 21311123323354 is 45332332111312.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41193619 + ... + 41707750.

It is an arithmetic number, because the mean of its divisors is an integer number (2024451455400).

Almost surely, 2^{21311123323354} is an apocalyptic number.

21311123323354 is a deficient number, since it is larger than the sum of its proper divisors (11080099963046).

21311123323354 is a wasteful number, since it uses less digits than its factorization.

21311123323354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82903077.

The product of its digits is 38880, while the sum is 34.

Adding to 21311123323354 its reverse (45332332111312), we get a palindrome (66643455434666).

The spelling of 21311123323354 in words is "twenty-one trillion, three hundred eleven billion, one hundred twenty-three million, three hundred twenty-three thousand, three hundred fifty-four".